This free online fuel consumption conversion tool makes it easy to convert fuel efficiency values between the most commonly used metric and imperial measurement systems. Whether you’re comparing vehicle specifications, calculating running costs, or converting international fuel economy figures, this calculator provides fast and accurate results.

With this fuel consumption calculator, you can convert between Kilometres per Litre (km/L), Litres per 100 Kilometres (L/100 km), Miles per Gallon (MPG – UK/Imperial), and US Miles per Gallon (MPG – US). Simply enter a value into any of the input fields, and the tool will automatically calculate and display the equivalent fuel consumption values across all other units, helping you easily compare efficiency standards used around the world.

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How to Use?

The fuel conversion calculator is a handy webtool to use to convert from one fuel consumption to another.

1. Enter a fuel value into one of the fields above.
2. All the other fields will automatically update to their converted fuel.
3. You can copy any fuel value to the clipboard, by clicking on the symbol.
4. Any number value will be accepted including the 'e' exponent.
5. If you would like to see another fuel added to the above, please contact us.

Fuel Consumption Unit Comparison Table

Key Differences to Know

• Lower values are better for L/100 km, as they represent less fuel used.
• Higher values are better for km/L and MPG, as they represent greater efficiency.
• UK gallons are larger than US gallons, so MPG (UK) values are always higher than MPG (US) for the same vehicle.
• L/100 km is commonly used in Australia, Europe, and many other countries.

Common Reference Conversions

• 1 US gallon = 3.785 litres
• 1 Imperial gallon = 4.546 litres
• MPG (UK) ≈ 1.2009 × MPG (US)